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Table 1 Characteristics of the study population, n = 7,915

From: Compliance with national recommendations for exercise during early pregnancy in a Danish cohort

Maternal age (years) n/(%)*
 <25 394 (5.0)
 25-29 2342 (29.6)
 30-34 3160 (39.9)
 35-39 1650 (20.8)
 ≥40 350 (4.4)
Parity  
 Nulliparous 4717 (59.6)
 Multiparous 3157 (39.9)
Degree of pregnancy planning  
 Very planned 3506 (44.3)
 Rather planned 2135 (27.0)
 Neither planned nor unplanned 1270 (16.0)
 Rather unplanned 354 (4.5)
 Very unplanned 313 (4.0)
Method of conception  
 Spontaneous 6656 (84.1)
 Assisted reproductive technology 894 (11.3)
Smoking before pregnancy  
 Yes 758 (9.6)
 No 6712 (84.8)
Physical exercise before pregnancy  
 Yes 5675 (71.7)
 No 2240 (28.3)
Body mass index (kg/m2)  
 <18.5 409 (5.2)
 18.5-24.9 5610 (70.9)
 25-29.9 942 (11.9)
 ≥30  
Disorders  
 Chronic disorders* 948 (12.0)
 Mental disorders 189 (2.4)
 None 5725 (72.3)
 Other disorders¤ 558 (7.0)
Reads and understands Danish language  
 Yes 7505 (94.8)
 No 349 (4.4)
Educational level  
 Advanced degree 3561 (45.0)
 3-4 years higher education 2267 (28.6)
 1-2 years higher education 511 (6.5)
 Skilled worker 251 (3.2)
 No education 524 (6.6)
Occupation  
 Employed 5297 (66.9)
 Unemployed 469 (5.9)
 Student 1182 (14.9)
 Other† 275 (3.5)
  1. *Chronic diseases; Hypertension, cardiac diseases, pulmonary diseases, diabetes, metabolic disorders, arthritis, epilepsy and migraine.
  2. ¤Other diseases reported were e.g. skin diseases, systemic lupus erythematosis, celiac disease, inflammatory bowel disease, hepatitis, gallstones, multiple sclerosis, thrombophilia, and polycystic ovarian syndrome.
  3. †Including stay at home mothers, pensioners and women on maternity leave.
  4. Due to missing data in some categories will the sum of women differ between categories.